Mineral and Nitrogen Nutrition in Plants (Multiple Choice Questions and Answers)

Mineral and Nitrogen Nutrition in Plants

Multiple Choice Questions and Answers

1. Synthesis of indole acetic acid in plant requires

(a) copper

(b) calcium

(c) molybdenum

(d) zinc

Answer: (d) zinc

2. Mineral constituent of chlorophyll is

(a) iron

(b) magnesium

(c) calcium

(d) potassium

Answer: (b) magnesium

3. Absorption of water and calcium is increased by

(a) manganese

(b) zinc

(c) copper

(d) boron

Answer: (d) boron

4. Active uptake of minerals by roots mainly depends on

(a) availability of oxygen

(b) light

(c) temperature

(d) availability of carbon dioxide

Answer: (a) availability of oxygen

5. Oxygen is referred to as a macronutrient because it is

(a) availability of oxygen

(b) required in relatively large quantities

(c) generated by the plants during photosynthesis

(d) required in various physiological processes

Answer: (b) required in relatively large quantities

6. The deficiency of nitrogen in plants develops colouration due to the synthesis of

(a) adenine

(b) adenosine diphosphate

(c) anthocyanin

(d) adenosine triphosphate

Answer: (c) anthocyanin

 7.  Micronutrients are elements which are

(a) required by the plants in large quantities

(b) required by the plants in traces or small quantities

(c) not all required by the plants

(d) synthesized in the plants

Answer: (b) required by the plants in traces or small quantities

 8. The major portion of the dry weight of plants comprises of

(a) carbon, hydrogen and oxygen

(b) zinc, copper and iron

(c) calcium, potassium and magnesium

(d) nitrogen, sulphur and phosphorus

Answer: (a) carbon, hydrogen and oxygen

9. Root hairs are the extensions of

(a) epiblema cells

(b) cortex cells

(c) pericycle cells

(d) xylem tracheids

Answer: (a) epiblema cells

 10. Passive absorption of minerals takes place through

(a) diffusion and ionic-exchange

(b) osmosis

(c) transpiration pull

(d) none of these

Answer: (a) diffusion and ionic-exchange

11. In nitrate assimilation, reduction of nitrates to ammonia is mediated by

(a) nitrate reductase

(b) nitrite reductase

(c) both a and b

(d) none of these

Answer: (c) both a and b

12. Which of the following convert the ammonia to nitrites?

(a) nitrosomonas

(b) nitrococcus

(c) nitrobacter

(d) both a and b

Answer: (d) both a and b

13. The mineral constituents of cell wall is

(a) iron

(b) magnesium

(c) potassium

(d) calcium

Answer: (d) calcium

 14. Active uptake of minerals by roots depends on the

(a) availability of oxygen

(b) light

(c) temperature

(d) availability of carbon dioxide

Answer: (a) availability of oxygen

 15. In nitrogen fixation

(a) plants convert atmospheric nitrogen to nitrates

(b) plants absorb ammonia from the soil

(c) the bacteria all housed on the plant roots

(d) the enzyme nitrogenase produces ammonia from gaseous nitrogen

Answer: (a) plants convert atmospheric nitrogen to nitrates

 16.  A fall in the ascorbic acid content in the plants is due to the deficiency of

(a) molybdenum

(b) zinc

(c) copper

(d) boron

Answer: (a) molybdenum

 17. Biological fixation of nitrogen is helped by

(a) zinc

(b) copper

(c) boron

(d) molybdenum

Answer: (d) molybdenum

 18. Which of the following is an insectivorous plant?

(a) Nepenthes

(b) Solanum

(c) Cuscuta

(d) Asparagus

Answer: (a) Nepenthes

19. Which is the correct statement?

(a) a parasite obtains the food from dead or organic matter

(b) a parasite obtains food, water and minerals from the body of living organisms called hosts

(c) insectivorous plants are parasites on host of green plants

(d) Cuscuta is a host

Answer: (b) a parasite obtains food, water and minerals from the body of living organisms called hosts

 20. Name the plant parasite

(a) Cuscuta

(b) Utricularia

(c) Rhizopus

(d) Green plants

Answer: (a) Cuscuta

 21. Roots can absorb minerals from the soil when they are in

(a) solid state

(b) liquid state

(c) ionic state

(d) gaseous state

Answer: (a) solid state

 22. Chlorosis in nitrogen different plants appears

(a) in the young leaves only

(b) in the mature leaves only

(c) first in the mature leaves and then in the young leaves

(d) first in the young leaves and then in the mature leaves

Answer: (b) in the mature leaves only

23. Chlorosis is

(a) production of abundant leaves in a plant

(b) the yellowing of leaves due to loss of chlorophyll

(c) the yellowing of leaves due to increase in chlorophyll content

(d) the production of a very few leaves in a plant

Answer: (b) the yellowing of leaves due to loss of chlorophyll

 24. Chlorosis in sulphur deficiency plants appears

(a) in the young leaves only

(b) first in the young leaves and then in the mature leaves

(c) in the mature leaves only

(d) first the in the mature leaves and then in the young leaves

Answer: (b) first in the young leaves and then in the mature leaves

 25. Synthesis of indole acetic acid in plants require

(a) copper

(b) potassium

(c) zinc

(d) calcium

Answer: (c) zinc

 26. Interveinal necrosis in lemon leaves is caused by the deficiency of

(a) molybdenum

(b) boron

(c) zinc

(d) copper

Answer: (c) zinc

 27. Absorption of water and calcium is increased by

(a) copper

(b) zinc

(c) boron

(d) manganese

Answer: (c) boron

 28. Which of the following is a macronutrient?

(a) manganese

(b) copper

(c) magnesium

(d) zinc

Answer: (c) magnesium

 29. The macro nutrients are elements which are

(a) not all required by the plants

(b) harmful to the plants

(c) required by the plants in traces

(d) required by the plants in large quantities

Answer: (d) required by the plants in large quantities

 30. The excess of nitrogen supply to plants produces

(a) no leaves at all

(b) yellow leaves

(c) less number of leaves

(d) dark-green leaves

Answer: (d) dark-green leaves

 31. Which of the following is a macro micronutrient?

(a) iron

(b) magnesium

(c) potassium

(d) calcium

Answer: (a) iron

32. Manganese is a micronutrient because it is

(a) required by the plants in large quantities

(b) required by the plant in small quantities

(c) traceable in the soil

(d) found in the soil in small quantities

Answer: (b) required by the plant in small quantities

 33. The drought spot of apples is caused by the deficiency of

(a) boron

(b) copper

(c) zinc

(d) molybdenum

Answer: (a) boron

34. Elements which are required by plants in minute quantities are called

(a) trace elements

(b) macro elements micro

(c) micro elements

(d) none

Answer: (a) trace elements

 35. Carbon is absorbed by plants as

(a) carbon monoxide

(b) carbon dioxide

(c) both

(d) none

Answer: (b) carbon dioxide

36. Elements required by the plants in large quantities are called

(a) trace elements

(b) macro elements

(c) micro elements

(d) macronutrients

Answer: (d) macronutrients

37. Oxygen is absorbed in molecular form from …… by the plants

(a) air

(b) water

(c) soil

(d) none

Answer: (a) air

38. Deficiency of ……….. causes death of the stem and roots

(a) copper

(b) zinc

(c) molybdenum

(d) calcium

Answer: (d) calcium

39. Deficiency of copper in Citrus results in a disease known as

(a) dieback

(b) chlorosis

(c) necrosis

(d) none

Answer: (a) dieback

 40. Drought rot of apples is caused by the deficiency of

(a) boron

(b) zinc

(c) molybdenum

(d) calcium

Answer: (a) boron

41. Technique of culturing plants in nutrient solutions is known as

(a) hydroponics

(b) water culture

(c) sand culture

(d) none

Answer: (a) hydroponics

 42. NPK means

(a) nitrogen, phosphorus and potassium

(b) sodium, potassium and phosphorus

(c) both a and b

(d) none of the above

Answer: (a) nitrogen, phosphorus and potassium

 43. The conversion of ammonia to nitrates is called

(a) ammonification

(b) nitrification

(c) denitrification

(d) none

Answer: (b) nitrification

 44. The process of biological nitrogen fixation requires a strong reducing agent and

(a) ATP

(b) GTP

(c) ADP

(d) all of the above

Answer: (a) ATP

45. The best known nitrogen fixing bacterium is

(a) Clostridium

(b) Cyanobacteria

(c) Rhizobium

(d) All

Answer: (c) Rhizobium

 46. A ……….pinkish reddish pigment in root nodules of leguminous plants is leg haemoglobin

(a) greenish

(b) yellowish

(c) greyish

(d) pinkish-reddish

Answer: (d) pinkish-reddish

 47. Plants which synthesise their own food are called

(a) autotrophs

(b) heterotrophs

(c) herbivores

(d) carnivores

Answer: (a) autotrophs

 48. Yellowing of leaves due to loss of chlorophyll is

(a) chlorosis

(b) necrosis

(c) die-back

(d) none

Answer: (a) chlorosis

 49. Localized death of tissues causes

(a) chlorosis

(b) necrosis

(c) die-back

(d) abscission

Answer: (b) necrosis

50. ‘Water core’ of turnip is caused by the deficiency of

(a) boron

(b) zinc

(c) molybdenum

(d) calcium

Answer: (d) calcium